I have seen a lot of great DIY carpenter bee traps that fill up with bees. I have friends that say the traps keep them out of the house.
https://www.pinterest.com/explore/carpenter-bee-trap/
The short answer is the percentage of ROI varies by region but, kitchen and bathroom upgrades including new cabinets and countertops always top the list. From there it depends a lot on the house, it's ... read more